Stockholders' Equity - Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2021	Apr. 24, 2020	Apr. 26, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operating expenses	$ 2,784	$ 2,678	$ 2,724
Other (expense) income, net	69	1	(47)
Net revenues	5,744	5,412	6,146
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications	11	(22)	(3)
Reclassification out of Accumulated Other Comprehensive Income | Recognized Gains on Defined Benefit Obligations
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operating expenses	0	(2)	(2)
Reclassification out of Accumulated Other Comprehensive Income | Realized Gains on Available-for-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (expense) income, net	0	(14)	0
Reclassification out of Accumulated Other Comprehensive Income | Realized Losses (Gains) on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net revenues	$ 11	$ (6)	$ (1)